What acid is formed when carbon dioxide dissolves in water, giving carbonated drinks their fizz?

Explanation

When carbon dioxide dissolves in water it forms carbonic acid, a weak acid responsible for the fizzy sensation and slightly sour taste in carbonated beverages. This same chemical process happens naturally when rainwater absorbs atmospheric carbon dioxide, making rain slightly acidic even without pollution. Carbonic acid is unstable and readily breaks back down into carbon dioxide and water, which is why opened soda eventually goes flat. Explore more Everyday Science MCQs on mcqstutor to keep practicing.